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Harnessing an unusual 'valley' quantum property of electronsYoshihiro Iwasa and colleagues from the RIKEN Center for Emergent Matter Science, the University of Tokyo and Hiroshima University have discovered that ultrathin films of a semiconducting material have properties that form the basis for a new kind of low-power electronics, termed 'valleytronics'.http://phys.org/news330938018.html
NanotechnologyFri, 26 Sep 2014 08:13:58 ESTnews330938018Photo-initiated charge separation in nanobiohybrid complexIn natural systems, electron flow is mediated by proteins that spatially organize donor and acceptor molecules with great precision. Achieving this guided, directional flow of information is a desirable feature in photovoltaic media. Researchers in the Nanobio Interfaces Group at the Center for Nanoscale Materials, Argonne National Laboratory, have designed self-assembled peptide materials that organize multiple electronic components capable of performing photo-induced charge separation.http://phys.org/news330591896.html
NanotechnologyMon, 22 Sep 2014 08:40:01 ESTnews330591896Scientists probe the next generation of 2-D materialsAs the properties and applications of graphene continue to be explored in laboratories all over the world, a growing number of researchers are looking beyond the one-atom-thick layer of carbon for alternative materials that exhibit similarly captivating properties.http://phys.org/news315756873.html
PhysicsThu, 03 Apr 2014 19:00:01 ESTnews315756873New nanomaterial increases yield of solar cellsResearchers from the FOM Foundation, Delft University of Technology, Toyota Motor Europe and the University of California have developed a nanostructure with which they can make solar cells highly efficient. The researchers published their findings on 23 August 2013 in the online edition of Nature Communications.http://phys.org/news296718147.html
NanotechnologyMon, 26 Aug 2013 06:42:39 ESTnews296718147Researchers get around bad gap problem with graphene by using negative differential resistance(Phys.org) —A team of researchers at the University of California has come up with a way to use graphene in a transistor without sacrificing speed. In a paper they've uploaded to the preprint server arXiv, the team describes how they took advantage of a property of graphene known as negative differential resistance to coax transistor-like properties out of graphene without causing it to behave as a semiconductor.http://phys.org/news296385190.html
NanotechnologyThu, 22 Aug 2013 10:30:01 ESTnews296385190Quantum communication controlled by resonance in 'artificial atoms'Researchers at the Niels Bohr Institute, together with colleagues in the US and Australia, have developed a method to control a quantum bit for electronic quantum communication in a series of quantum dots, which behave like artificial atoms in the solid state. The results have been published in the scientific journal Physical Review Letters.http://phys.org/news295007375.html
PhysicsTue, 06 Aug 2013 11:29:44 ESTnews295007375Hybrid nanostructure with extreme light absorption looks promising for photovoltaics(Phys.org) —In photovoltaics, there is generally a trade-off in terms of semiconductor thickness, with thicker semiconductors offering better photon absorption and thinner ones offering higher charge carrier extraction efficiency. In recent years, scientists have begun investigating semiconductor nanowire solar cells, which tackle this tradeoff through morphology-dependent resonances that significantly enhance the absorption compared to a planar film.http://phys.org/news291887454.html
NanotechnologyMon, 01 Jul 2013 09:40:01 ESTnews291887454Organic electronics: Imaging defects in solar cells(Phys.org) —Researchers at Ludwig-Maximilians-Universitaet in Munich have developed a new method for visualizing material defects in thin-film solar cells.http://phys.org/news291557886.html
NanotechnologyThu, 27 Jun 2013 14:10:01 ESTnews291557886Nano-engineering boosts efficiency of materials that convert waste heat to electrical energyHigh-performance thermoelectric materials that convert waste heat to electricity could one day be a source of more sustainable power. But they need to be a lot more efficient before they could be effective on a broad scale in places like power plants or military bases, researchers say.http://phys.org/news289130665.html
NanotechnologyThu, 30 May 2013 11:04:34 ESTnews289130665Engineers enable 'bulk' silicon to emit visible light for the first timeElectronic computing speeds are brushing up against limits imposed by the laws of physics. Photonic computing, where photons replace comparatively slow electrons in representing information, could surpass those limitations, but the components of such computers require semiconductors that can emit light.http://phys.org/news283602705.html
PhysicsWed, 27 Mar 2013 11:31:59 ESTnews283602705Fantastic flash memory combines graphene and molybdeniteSwiss scientists have combined two materials with advantageous electronic properties—graphene and molybdenite—into a flash memory prototype that is very promising in terms of performance, size, flexibility and energy consumption.http://phys.org/news282921913.html
NanotechnologyTue, 19 Mar 2013 14:25:31 ESTnews282921913Researchers build switchable magnetic logic gate(Phys.org)—A team of scientists from several research centers in South Korea, has succeeded in building a logic circuit that is based on switchable magnetism, rather than electronics. They describe their research and a prototype they've built in a paper they've had published in the journal Nature.http://phys.org/news278837969.html
PhysicsThu, 31 Jan 2013 06:59:37 ESTnews278837969A new world record for solar cell efficiencyIn a remarkable feat, scientists at Empa, the Swiss Federal Laboratories for Materials Science and Technology, have developed thin film solar cells on flexible polymer foils with a new record efficiency of 20.4 percent for converting sunlight into electricity. The cells are based on CIGS semiconducting material known for its potential to provide cost-effective solar electricity. The technology is currently awaiting scale-up for industrial applications.http://phys.org/news277650360.html
TechnologyThu, 17 Jan 2013 13:06:08 ESTnews277650360Complex oxides become multifunctional at ultimate quantum limit(Phys.org)—A University of Arkansas physicist and his colleagues have examined the lower limits of novel materials called complex oxides and discovered that unlike conventional semiconductors the materials not only conduct electricity, but also develop unusual magnetic properties.http://phys.org/news267792887.html
PhysicsTue, 25 Sep 2012 11:55:14 ESTnews267792887Researchers create working Mott transistor prototype(Phys.org) -- Engineers from several research organizations working together in Japan have developed a working prototype of a Mott transistor, a possible alternative to the standard silicon based field-effect transistor (FET). The prototype, as the team describes in their paper published in the journal Nature, used a new type of material, called a Mott insulator that changes from a resistor to a metal when an electric charge is introduced.http://phys.org/news262502312.html
NanotechnologyThu, 26 Jul 2012 06:19:15 ESTnews262502312Excitons: Exotic particles, chilled and trapped, form giant matter wavePhysicists have trapped and cooled exotic particles called excitons so effectively that they condensed and cohered to form a giant matter wave.http://phys.org/news257080023.html
PhysicsThu, 24 May 2012 12:07:27 ESTnews257080023British team devises method for separating carbon nanotubes cheaply(PhysOrg.com) -- When single walled carbon nanotubes (SWCNTs) are made, they come out in both metallic and semiconducting material form. Unfortunately, different applications require one or the other of these materials, but not both, which means they need to be separated. Even more unfortunately, efforts to do so have proven to be very expensive. Now, though, due to the efforts of a British team of physicists, as they describe in their paper in ACS Nano, a new method has been devised that allows SWCNTs to be separated cheaply enough to allow for bulk manufacturing.http://phys.org/news246183851.html
NanotechnologyThu, 19 Jan 2012 09:00:01 ESTnews246183851Researchers create two-segment nanotubes with distinct semiconducting domains(PhysOrg.com) -- A group of researchers working in Japan has devised a means of creating dual segmented nanotubes where each segment has separate and distinct semiconducting properties. The team describes how they were able to create the unique nanotubes which are joined by means of a heterojunction, in their paper published in Science.http://phys.org/news238410928.html
NanotechnologyFri, 21 Oct 2011 10:15:48 ESTnews238410928New generation of superlattice cameras add more 'color' to night visionRecent breakthroughs have enabled scientists from the Northwestern University's Center for Quantum Devices to build cameras that can see more than one optical waveband or "color" in the dark. The semiconducting material used in the cameras &#150; called type-II superlattices &#150; can be tuned to absorb a wide range of infrared wavelengths, and now, a number of distinct infrared bands at the same time.http://phys.org/news238323792.html
PhysicsThu, 20 Oct 2011 10:03:47 ESTnews238323792Bismuth-based semiconducting material could enable control of electron spinIn the developing field of spintronics, physicists are designing devices to transmit data using the inherent axial rotation, or spin, of electrons rather than their charge as is used in electronics. Weak coupling of electron spin to electrical currents, however, makes gaining this level of control difficult. Yoshinori Tokura from the RIKEN Advanced Science Institute, Wako, working with colleagues from across Japan, has now shown that the semiconducting material BiTeI could provide the control needed because of its unusual atomic arrangement. http://phys.org/news237807268.html
PhysicsFri, 14 Oct 2011 10:34:41 ESTnews237807268Nano-LEDs emit full visible spectrum of light(PhysOrg.com) -- Physicists from Taiwan have designed and fabricated nano-sized light-emitting diodes (LEDs) that emit light spanning the entire visible spectrum. Although the tiny full-color LEDs aren't intended for commercial lighting applications, they should be useful in high-resolution microscopy and subwavelength photolithography.http://phys.org/news227520971.html
NanotechnologyFri, 17 Jun 2011 09:17:03 ESTnews227520971New inorganic semiconductor layers hold promise for solar energy(PhysOrg.com) -- A team of researchers from the University of Chicago and the U.S. Department of Energy's (DOE) Argonne National Laboratory has demonstrated a method that could produce cheaper semiconductor layers for solar cells.http://phys.org/news226231899.html
NanotechnologyThu, 02 Jun 2011 12:00:03 ESTnews226231899New solar energy conversion process could revamp solar power productionStanford engineers have figured out how to simultaneously use the light and heat of the sun to generate electricity in a way that could make solar power production more than twice as efficient as existing methods and potentially cheap enough to compete with oil.http://phys.org/news199962208.html
TechnologyMon, 02 Aug 2010 10:03:46 ESTnews199962208Molding the Future of Plastic Electronic Production(PhysOrg.com) -- E-readers that can be bent and folded, "smart" bandages that signal when they need changing based on oxygen levels, and biodegradable radio frequency identification tags that help companies track and manage stock - these are all real possibilities in the field of organic electronics, which uses carbon-based materials that are intrinsically semiconductors. Recently, using the NSLS, a group of researchers from the National Institute of Standards and Technology (NIST), Arizona State University, and the University of Oulu, Finland, analyzed one promising organic semiconducting material in an effort to bring these technologies, and many more, to the marketplace.http://phys.org/news187983065.html
PhysicsTue, 16 Mar 2010 19:10:02 ESTnews187983065Mechanical devices stamped on plastic(PhysOrg.com) -- Microelectromechanical devices -- tiny machines with moving parts -- are everywhere these days: they monitor air pressure in car tires, register the gestures of video game players, and reflect light onto screens in movie theaters. But they're manufactured the same way computer chips are, in facilities that can cost billions of dollars, and their rigidity makes them hard to wrap around curved surfaces.http://phys.org/news186403510.html
TechnologyFri, 26 Feb 2010 10:51:18 ESTnews186403510New structure could produce efficient semiconductor laser sources(PhysOrg.com) -- University of Wisconsin-Madison researchers have achieved a nanoscale laser structure they anticipate will produce semiconductor lasers in the next two years that are more than twice as efficient as current continuous-wave lasers emitting in the mid-infrared.http://phys.org/news180032976.html
PhysicsMon, 14 Dec 2009 18:00:20 ESTnews180032976Stretchable Nanotube Films May Advance Medical Electronics (Update)(PhysOrg.com) -- One of the issues hindering the development of medical electronic devices capable of being implanted in the human body is the lack of suitable materials. Most semiconducting materials are stiff and brittle, while human tissue is soft and pliable. Scientists at the University of California, Los Angeles (UCLA), appear to have taken a key step forward in implantable electronics research.http://phys.org/news160652779.html
NanotechnologyMon, 04 May 2009 10:48:24 ESTnews160652779New, Unusual Semiconductor is a Switch-Hitter(PhysOrg.com) -- A research group in Germany has discovered a semiconducting material that can switch its semiconducting properties -- turning from one type of semiconductor to another -- via a simple change in temperature. This intriguing behavior may make the material useful in efforts to create better performing integrated circuits, which form the backbone of almost all electronic devices.http://phys.org/news152534700.html
PhysicsFri, 30 Jan 2009 10:46:08 ESTnews152534700